I found this on the Camping World website. It will hold up to 2 gallons and spray under pressure for 6 mins. Pressure is obtained by filling with water hose. There is also one that holds up to 3 gallons and will spray for 8 mins.
Check kit out!!!!!!!!!!!!!!!!
RinseKit Plus
Item No. 335984
$84.62 on sale price of $99.99